题解 | #查看不同年龄段的用户明细#
查看不同年龄段的用户明细
https://www.nowcoder.com/practice/ae44b2b78525417b8b2fc2075b557592
select device_id,gender,case when age <20 then '20岁以下' when age >=20 and age <=24 then '20-24岁' when age >24 then '25岁及以上' when age is null then '其他' end from user_profile